What were the first steps in the development of the wheel?

Scientists who have made a study of the origins of man’s technology believe that the wheel was first thought of as a result of the observation of partial rotary motion in the human and animal bodies. Our arms, legs, hips, shoulders, wrists, ankles and even heads rotate to some extent but, of course, cannot turn all the way around. Early man, possibly noticing this semi rotation applied the principle to his fire making.

What                    Why                    When                    Where                   Which                   Who

                   How                    Does                    Do                    Is                   Can